Question

1. Efetue as multiplicações. a) (+3) · (+2) = b) (+8) · (–4) = c) (+1) · (–9) = d) (+8) · (+3) = e) (+7) · (+1) = f) (–8) · (+1) = g) (+10) · (+9) = h) (+1) · (+15) = i) (–4) · (+12) = j) (+3) · (+7) = k) (+3) · (–2) = l) (–4) · (+7) = m) (+2) · (+35) = n) (+21) · (–12) = 2. Efetue as multiplicações com mais de dois fatores. a) (–4) · (–5) · (+2) = b) (+9) · (–2) · (+5) = c) (–5) · (+3) · (–2) = d) (–10) · (+2) · (+3) = e) (–1) · (–4) · (+3) · (–2) = f) (–7) · (+2) · (–1) = g) (–5) · (–3) · (–8) · (+3) = h) (+10) · (–2) · (+1) · (–3) · (+2) = i) (–3) · (+2) · (–1) · (+4) · (–10) = j) (–1) · (+1) · (–1) = k) (–2) · (–2) · (–2) · (–2) · (–2) = l) (–1) · (–1) · (–1) · (–1) · (–1) · (–1) = 3. Aplique a propriedade distributiva e efetue as operações. a) (–3) · (8 + 4) = b) (+5) · (10 + 3) = c) (–2) · (5 + 1) = d) (–3) · (–2 – 5) = Se poder me ajudar eu agradeço

Answer 1

Resposta:

1.

a)+6

b)-32

c)-9

d)+24

e)+7

f)-8

g)+90

h)+15

i) -48

j)+21

k) -6

l) -28

m) +70

n)-252

2.

a) +40

b) -90

c) +30

d) -60

e) -24

f) +14

g) -360

h) +120

i) -240

j) +1

k) -32

l) +1

3.

a) -24 -12 = -36

b) 50 +15 = 65

c) -10 -2 = -12

d) 6 +15 = 15

Explicação passo-a-passo:

quando se tem multiplicação de sinais, a regra é:

sinais iguais = positivo (+)

sinais diferentes = negativo (-)

exemplo:

(-1) . (-2) = +2

(-1) . (+2) = -2